A high-selectivity switched-capacitor bandpass filter is presented. The filter center frequency is 100 kHz with a -3 dB bandwidth of 980 Hz (i.e., with a quality factor Q ∼ 100). This has been implemented with a 12th-order transfer function whose poles are placed at only two frequencies. This choice has been used in the integrated circuit realization. In fact, the transfer function has been implemented using the cascade of six biquad cells of only two types. For the available 20 samples, the center frequency mean-value error is lower than 0.2%, and the Q mean-value error is lower than 0.2% as well. The filter is realized in a not-recent BiCMOS technology (L NMOS = 4 μm, L PMOS = 3 μm). The same performance (opamp, switches, and overall filter) can be easily obtained with a standard scaled-down (0.35 μm, for instance) CMOS technology. In this direction, an evaluation of the area and power consumption of the circuit as implemented in a standard 0.35-μm CMOS technology is finally given.

Baschirotto, A., Bollati, G., Fassina, A., Montecchi, F., Stefani, F. (2001). A high-selectivity switched-capacitor bandpass filter. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS. 2, ANALOG AND DIGITAL SIGNAL PROCESSING, 48(4), 351-358 [10.1109/82.933793].

A high-selectivity switched-capacitor bandpass filter

BASCHIROTTO, ANDREA;
2001

Abstract

A high-selectivity switched-capacitor bandpass filter is presented. The filter center frequency is 100 kHz with a -3 dB bandwidth of 980 Hz (i.e., with a quality factor Q ∼ 100). This has been implemented with a 12th-order transfer function whose poles are placed at only two frequencies. This choice has been used in the integrated circuit realization. In fact, the transfer function has been implemented using the cascade of six biquad cells of only two types. For the available 20 samples, the center frequency mean-value error is lower than 0.2%, and the Q mean-value error is lower than 0.2% as well. The filter is realized in a not-recent BiCMOS technology (L NMOS = 4 μm, L PMOS = 3 μm). The same performance (opamp, switches, and overall filter) can be easily obtained with a standard scaled-down (0.35 μm, for instance) CMOS technology. In this direction, an evaluation of the area and power consumption of the circuit as implemented in a standard 0.35-μm CMOS technology is finally given.
Articolo in rivista - Articolo scientifico
0.35 micron; 100 kHz; 3 micron; 4 micron; 980 Hz; BiCMOS technology; Q mean-value error; biquad cells; center frequency mean-value error; circuit area; filter center frequency; high-selectivity switched-capacitor bandpass filter; power consumption; quality factor; transfer function; BiCMOS analogue integrated circuits; Q-factor; band-pass filters; biquadratic filters; switched capacitor filters; transfer functions
English
2001
48
4
351
358
none
Baschirotto, A., Bollati, G., Fassina, A., Montecchi, F., Stefani, F. (2001). A high-selectivity switched-capacitor bandpass filter. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS. 2, ANALOG AND DIGITAL SIGNAL PROCESSING, 48(4), 351-358 [10.1109/82.933793].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/36789
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